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MIC4467/4468/4469
General Description
The MIC4467/8/9 family of 4-output CMOS buffer/drivers is an
expansion from the earlier single- and dual-output drivers, to
which they are functionally closely related. Because package
pin count permitted it, each driver has been equipped with a
2-input logic gate for added ?exibility. Placing four high-power
drivers in a single package also improves system reliability
and reduces total system cost. In some applications, one of
these drivers can replace not only two packages of single-
input drivers, but some of the associated logic as well.
Although primarily intended for driving power MOSFETs,
and similar highly capacitive loads, these drivers are equally
well suited to driving any other load (capacitive, resistive, or
inductive), which requires a high-ef?ciency, low-impedance
driver capable of high peak currents, rail-to-rail voltage swings,
and fast switching times. For example, heavily loaded clock
lines, coaxial cables, and piezoelectric transducers can all be
driven easily with MIC446X series drivers. The only limitation
Logic Diagrams
Micrel, Inc.
MIC4467/4468/4469
Quad 1.2A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS
Features
? Built using reliable, low power CMOS processes
? Latchproof. Withstands 500mA Inductive Kickback
? 3 Input Logic Choices
? Symmetrical Rise and Fall Times ............................25ns
? Short, Equal Delay Times .......................................75ns
? High Peak Output Current ....................................... 1.2A
? Wide Operating Range .................................. 4.5 to 18V
? Low Equivalent Input Capacitance (typ) .................. 6pF
? Inputs = Logic 1 for Any Input From 2.4V to V S
? ESD Protected
Applications
? General-Purpose CMOS Logic Buffer
? Driving All 4 MOSFETs in an H-Bridge
? Direct Small-Motor Driver
? Relay or Peripheral Drivers
? Dual Differential Output Power Drivers
? CCD Driver
? Pin-Switching Network Driver
MIC4467
V S
14
MIC4468
V S
14
MIC4469
V S
14
1A
1B
2A
2B
3A
3B
4A
4B
1
2
3
4
5
6
8
9
13
12
11
10
1Y
2Y
3Y
4Y
1A
1B
2A
2B
3A
3B
4A
4B
1
2
3
4
5
6
8
9
13
12
11
10
1Y
2Y
3Y
4Y
1A
1B
2A
2B
3A
3B
4A
4B
1
2
3
4
5
6
8
9
13
12
11
10
1Y
2Y
3Y
4Y
7
GND
7
GND
7
GND
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
July 2005
1
MIC4467/4468/4469
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